Ten real-valued features are computed
for each cell nucleus:
a) radius (mean of distances from center to points
on the perimeter)
b) texture (standard deviation of gray-scale values)
c) perimeter
d) area
e) smoothness (local variation in radius lengths)
f) compactness (perimeter^2 / area - 1.0)
g) concavity (severity of concave portions of the
contour)
h) concave points (number of concave portions of the
contour)
i) symmetry
j) fractal dimension ("coastline approximation" - 1)
Several of the papers listed above contain detailed descriptions of
how these features are computed.
The mean, standard error, and "worst" or largest (mean of the three
largest values) of these features were computed for each image,
resulting in 30 features. For instance, field 3 is Mean Radius,
field
13 is Radius SE, field 23 is Worst Radius.
All feature values are recoded with four significant digits.
Se ha
extraído del repositorio UCI del directorio
"breast-cancer-wisconsin ". La fecha del dataset es noviembre 1995.
Donors: Nick Street